I just upgraded from 10.3.9 to 10.4.4. On my own Cube (3rd such upgrade) I used the option of holding down the "C" key while booting (the DVD was already in the drive) & starting from the DVD. Now, my owner account is either corrupt or missing. Any action that requires a password is rejected (my password doesn't work) and if I log out (as me) my name isn't even shown on the logon list. Another name is there - but that is not a sys administrator account. So I cannot make any changes (like upgrading to 10.4.6). Any ideas??? Ken Johnson